INDEX — GLOSSARY. 



45t 



Mice, inheritance of color in, 783 

 Microgamete — sperm, 694 

 Micronucleus, the smaller of the two 

 nuclei of certain protozoa, 

 674, 699 

 Micropyle, a small hole, 701 

 Microsome, a small body, 672 

 Microspore — the smaller spore, when 

 there are two kinds. It gives 

 rise to a male gametophyte, 

 286 

 Microspora, growth of, 728 

 Middle ear, 87, 403 

 Migration of birds, 843 

 Mildew, 257, 748 



Milkweed, pollination of, 255, 256, 851 

 Mimicry, 865-867 

 Mink, 663 



Mirabilis Jalapa. See four o'clock. 

 Mistletoe, 663, 751 

 Mites, 571 



Mitosis, 180, 181, 479, 686 

 Moa, 650 

 Mocking bird, 650 

 Modified roots, 103-106 



stems and branches, 107-113 

 Moles, 652 

 Mollusca, 592 

 Mollusc, exoskeleton of, 418 



foot of, 592 



mantle of, 592 



segmentation of, ^^;^ 



shell of, 349, 592 



structure of, 592 

 Molluscoidea, 547 

 Monotremata, 652, 653 

 Monkeys, 652, 668 

 Monocotyledons, 171, 172, 300 



growth of, 729 

 Monodelphia, 652, 657 

 Monodelphous, 133 

 Monoecious, 128 

 Morchella, 258 

 Mosquitoes, 587, 768 

 Mosses, 264, 273 



sperms of, 700 

 Mother of pearl, 605 

 Moths, 586 



Mougeota, conjugation in, 693 

 Mouth parts of cockroach, 160 



of insects, 459 

 Mucous epithelium, 720 

 Mud puppies, 639 

 Mullet, 636 

 Multiple fruit, 165 

 Multicellular body, 706 



Numbers refer to paragraphs ; Black Fac 



Multipolar nerve cells, 435 

 Muscle, 325, 429 



fibres, 89-92, 408, 409 

 Muscles of annelids, 408-411 



of vertebrates, 414 



origin of, 721 



stimulus, 431 

 Muscular activity, 488 



contraction, 430 

 Mushrooms, 255 



Mycelium — the mass of threads which 

 constitute the vegetative body 

 of a fungus. 

 Mycorhiza, 216 

 Mycetozoa, 225 

 Mygale, 153 

 Myxomycetes, 225 

 Myonemes, 88, 407 

 Myriapoda, 574 

 Myrrh, 261 

 Myxamoeba, 225 



N — symbol for nitrogen. 

 Nails, 347 

 Narwhal, 665 

 Natural selection, 819 

 Nautilus, 168, 611 

 Nematoda, 540 

 Nemertini, 541 

 Nephridia, 329, 593 

 Nephridia of worms, 490 

 Nereis, 67, 305, 543 



locomotion of, 411 



respiration in, 476 



sense organs of, 360 

 Nerve cells, 97, 100, 10 1 

 of coelenterates, 435 

 types of, 435 _ 



-muscle mechanism, 325 

 Nervous system, 434 



of annelids, 438 



of arthropods, 443 



of dolichoglossus, 618 



of jelly fish, 437 



of nereis, 98 



of tunicates, 619 



of vertebrates, 444 

 Nettling cells, 524 

 Neuroptera, 585 

 Newts, 637, 639 

 Nictitating membrane, 648 

 Nitrate bacteria, 229 

 Nitrite bacteria, 229 

 Nitrogen bacteria, 217 



waste, 488, 490 

 Noctiluca, 512 

 e numbers refer to figures. 



